1609138 has 8 divisors (see below), whose sum is σ = 2423088. Its totient is φ = 801444.

The previous prime is 1609109. The next prime is 1609141. The reversal of 1609138 is 8319061.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 856 + ... + 1987.

It is an arithmetic number, because the mean of its divisors is an integer number (302886).

2^1609138 is an apocalyptic number.

1609138 is a deficient number, since it is larger than the sum of its proper divisors (813950).

1609138 is a wasteful number, since it uses less digits than its factorization.

1609138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3128.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1609138 is about 1268.5180329818. The cubic root of 1609138 is about 117.1829509227.

It can be divided in two parts, 16091 and 38, that added together give a square (16129 = 127²).

The spelling of 1609138 in words is "one million, six hundred nine thousand, one hundred thirty-eight".